JP - yes, the game is desienged with what appears to be a chance-to-hit ratio for the crew in each compartment. Hence the values I posted way earlier. If you set those values for the Conn to all be 0, then your crew will not suffer damage from attacks to the Conn or the AA positions.
But that is based on the presumption that the health damage comes from damage inflicted somehow to those spots on the sub itself. That may or may not be the case.
My game in as-delivered condition would end up with the crew ALL exhausting themselves by the return from patrol. It would start with the Conn/AA crews and the rest would also slowly perish from exhaustion. I had not taken hits or damage in any way and presumed there to be a problem with the sleep schedule. Almost none of them EVER slept. I tried rotating positions and the guys in the worst shape to the shift that would be sleeping but it didn't work.
The fact that the ENTIRE crew was passing out and dying like that DOES make me wonder about the sub taking damage. I've been fiddling with the Hitpoints and other variables in all the files for a few days now and no longer have problems with the crew. Their team efficiencies are always maxed, they sleep seemingly ok and regenerate their fatigue quickly. Likewise, I set all my compartments so the crew themselves don't take damage. That setup is over-the-top for any sim die-hards, but it HAS eliminated the "death by fatigue" issues.
Sailors are hard workers, but no Captain runs his ship that hard for longer than is necessary. I am wondering more and more if the sub WAS taking damage slowly somehow and if the crews were exhausting themselves doing Maintenance service. Can't say I ever saw anything pop up in the damage report though.
This one remains a mystery to me, but if any of you are having problems try the 0 Chance mod first (\Data\UPCData\UPCUnitsData\UnitParts#Shipname.upc ) Within each of those files should be Three or Four separate sets of values for each available Conn Tower throughout the war, so set the 0s for the Watch and any AA positions and report back. I've got LOADS more mods on my rig, so much that I can't say with any certainty what is or is not keeping my crew alive. So give this a shot and if it doesn't work, let me know and I'll try looking deeper into what I've already modded with my crew values.
I can't help but keep wondering if this is some sort of SecuRom issue.

The way it takes so long but eventually terminates your game for you seems like something they'd do to spoil the game for people with invalid copies. Thing is, mine's valid. Hopefully its just a glitch the devs missed when they Bet.... oooooh, snap! That's right. I forgot. THEY NEVER BETA TESTED THE DANG THING!

